1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* f_basic.c Basic Classifier
*
* Authors: Thomas Graf <tgraf@suug.ch>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <linux/if.h>
#include "utils.h"
#include "tc_util.h"
#include "m_ematch.h"
static void explain(void)
{
fprintf(stderr,
"Usage: ... basic [ match EMATCH_TREE ]\n"
" [ action ACTION_SPEC ] [ classid CLASSID ]\n"
"\n"
"Where: SELECTOR := SAMPLE SAMPLE ...\n"
" FILTERID := X:Y:Z\n"
" ACTION_SPEC := ... look at individual actions\n"
"\n"
"NOTE: CLASSID is parsed as hexadecimal input.\n");
}
static int basic_parse_opt(const struct filter_util *qu, char *handle,
int argc, char **argv, struct nlmsghdr *n)
{
struct tcmsg *t = NLMSG_DATA(n);
struct rtattr *tail;
long h = 0;
if (handle) {
h = strtol(handle, NULL, 0);
if (h == LONG_MIN || h == LONG_MAX) {
fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n",
handle);
return -1;
}
}
t->tcm_handle = h;
if (argc == 0)
return 0;
tail = (struct rtattr *)(((void *)n)+NLMSG_ALIGN(n->nlmsg_len));
addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0);
while (argc > 0) {
if (matches(*argv, "match") == 0) {
NEXT_ARG();
if (parse_ematch(&argc, &argv, TCA_BASIC_EMATCHES, n)) {
fprintf(stderr, "Illegal \"ematch\"\n");
return -1;
}
continue;
} else if (matches(*argv, "classid") == 0 ||
strcmp(*argv, "flowid") == 0) {
unsigned int classid;
NEXT_ARG();
if (get_tc_classid(&classid, *argv)) {
fprintf(stderr, "Illegal \"classid\"\n");
return -1;
}
addattr_l(n, MAX_MSG, TCA_BASIC_CLASSID, &classid, 4);
} else if (matches(*argv, "action") == 0) {
NEXT_ARG();
if (parse_action(&argc, &argv, TCA_BASIC_ACT, n)) {
fprintf(stderr, "Illegal \"action\"\n");
return -1;
}
continue;
} else if (matches(*argv, "police") == 0) {
NEXT_ARG();
if (parse_police(&argc, &argv, TCA_BASIC_POLICE, n)) {
fprintf(stderr, "Illegal \"police\"\n");
return -1;
}
continue;
} else if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
argc--; argv++;
}
tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail;
return 0;
}
static int basic_print_opt(const struct filter_util *qu, FILE *f,
struct rtattr *opt, __u32 handle)
{
struct rtattr *tb[TCA_BASIC_MAX+1];
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_BASIC_MAX, opt);
if (handle)
print_hex(PRINT_ANY, "handle",
"handle 0x%x ", handle);
if (tb[TCA_BASIC_CLASSID]) {
uint32_t classid = rta_getattr_u32(tb[TCA_BASIC_CLASSID]);
SPRINT_BUF(b1);
print_string(PRINT_ANY, "flowid", "flowid %s ",
sprint_tc_classid(classid, b1));
}
if (tb[TCA_BASIC_EMATCHES])
print_ematch(f, tb[TCA_BASIC_EMATCHES]);
if (tb[TCA_BASIC_POLICE]) {
print_nl();
tc_print_police(f, tb[TCA_BASIC_POLICE]);
}
if (tb[TCA_BASIC_ACT]) {
tc_print_action(f, tb[TCA_BASIC_ACT], 0);
}
return 0;
}
struct filter_util basic_filter_util = {
.id = "basic",
.parse_fopt = basic_parse_opt,
.print_fopt = basic_print_opt,
};
|
